phpMyAdmin is a tool intended to handle the
administration of MySQL over the Web. It can
create, rename, and drop databases,
create/drop/alter tables, delete/edit/add fields,
execute any SQL statement, manage keys on fields,
create dumps of tables and databases,
export/import CSV data, and administrate one
single database and multiple MySQL servers.

LimeSurvey (formerly PHPSurveyor) is a Web
application that interacts with MySQL, MSSQL, or
Postgres to develop surveys, publish surveys, and
collect responses to surveys. Once a survey has
been created, data can be inserted into the survey
either by a "pretty" public screen which presents
each question one at a time, or by a quick and
nasty data entry screen. It includes the capacity
to generate individualized "tokens", so that
invitations can be issued to participants. It also
has the capacity to set conditions on whether
questions will display (branching), numerous
question types, and a basic statistics function.

MuseScore lets you notate and compose music easily with your keyboard, your mouse, or a MIDI keyboard. You can print beautifully engraved sheet music or export it as PDF or PNG. You can play your score, transpose it, and save it as audio or MIDI file. MuseScore also supports MusicXML to let you share your composition with other scorewriters. MuseScore is often advertised as a cost effective alternative for Sibelius and Finale.

XWiki is a WikiWiki clone written in Java that supports many popular features of other Wikis like the Wiki syntax, version control, attachments, security, and searching, but also many advanced features like templates, database and dynamic development using scripting languages (Velocity, Groovy, Ruby, Python, PHP, and more), an extension system and skinability, J2EE scalability, an XML/RPC remote API, statistics, RSS feeds, PDF exporting, WYSIWYG editing, an Office viewer and importer, and a lot more.

Dabo is a three-tier, cross-platform database
application development framework, written in
Python with the wxPython GUI toolkit. The controls
in Dabo's UI are easily bound to data by setting
two properties. The business object is designed to
afford you complete control over the validation
and handling of your data. The cursor classes are
abstracted from their backend implementations,
allowing for easy support of nearly any backend
database. Dabo's design and approach has been
inspired by RAD database development tools such as
Visual FoxPro, Delphi, and Visual Basic.

Roundcube Webmail is a browser-based, multilingual IMAP client with an application-like user interface. It provides the full functionality you expect from an email client, including MIME support, address book, and folder manipulation. High extensibility is granted by the plugin API and the user interface is fully skinnable using XHTML and CSS 2.

BleachBit deletes junk to recover disk space and maintain privacy. It rids your system of old junk including cache, Internet history, temporary files, unused locale files (better than localepurge), logs, and cookies. Designed for Linux systems, it wipes clean 50 applications including Adobe Reader, Bash, Firefox, Flash, OpenOffice.org, Opera, Real Player, Skype, and more. It shreds files so that they cannot be recovered, and it wipes free disk space to hide insecurely deleted files. It offers both a simple PyGTK GUI and a command line interface for automation.